Every computer in the world has a hard drive, but how exactly does it work? You may be surprised to learn it’s essentially just a tiny arm that reads and writes on a disk spinning hundreds of times per minute.

It’s a sight rarely ever seen as the hard drive is in a protective case, and even under a watchful eye, moves quicker than our brains can process. Thankfully, The Slow Mo Guys are back and show us in glorious slow motion how it all works.